ID 原文 译文
55717 研究分析了导航系统接收传感器网络所面临的攻击特点,传统无线传感器网络的干扰检测方法难以准确定位干扰和校正位置,提出了基于改进的到达角度定位机制的攻击检测算法确定受到干扰的点,并进行干扰校正;然后基于导航系统抗欺骗干扰原理,提出了单干扰源双曲线定位算法。 Studied and analyzed the navigation system receives the attack characteristics of sensor networks are facing, the interference of traditional wireless sensor network detection method is difficult to accurately position the interference and correction, is proposed based on improved arrival Angle positioning mechanism of the attack detection algorithm to determine the interference, and interference correction;Then, on the basis of the principle of navigation system of deception jamming single interference sources hyperbolic positioning algorithm is proposed.
55718 最后,利用所提算法进行实验,结果表明,攻击检测和校正效率很高,理想条件下干扰源定位效率也较高。 Finally, the experiment using the proposed algorithm, the results showed that the attack detection and correction efficiency is very high, ideal location interference sources under the condition of efficiency is also higher.
55719 波达方向(direction of arrival,DOA)估计问题是单基地多输入多输出(multiple input multiple output,MIMO)雷达信号处理中的一个关键问题。 DOA (direction of concatenated, DOA estimation problem is single base multiple input multiple output (multiple input multiple output, MIMO) is a key problem in radar signal processing.
55720 在低信噪比、低快拍数的情况下,常规DOA估计算法的性能会严重下降。 In low signal-to-noise ratio, low fast, number of cases, the performance of the conventional DOA estimation algorithm can lead to serious decline.
55721 针对此问题,提出一种新的DOA估计算法:降维酉旋转不变性信号参数估计技术算法。 Aiming at this problem, a new DOA estimation algorithm is proposed: dimension reduction unitary rotation invariance signal parameter estimation algorithm.
55722 该算法首先通过降维变换将MIMO雷达数据变换至低维信号空间,然后在该低维信号空间构造实值旋转不变性方程估计目标的DOA。 The algorithm firstly by dimension reduction transform the MIMO radar data transform to low visa number space, structure and low in the visa number Spaces rotation invariance equation to estimate the DOA of the target.
55723 仿真结果表明该方法能够在低信噪比、低快拍数的环境下获得较常规ESPRIT方法更高的DOA估计精度,同时具有更低的运算量。 The simulation results show that the method can in low signal-to-noise ratio, low the number of fast, environment to obtain higher than conventional ESPRIT method of DOA estimation precision, and has lower computational complexity.
55724 以长期运行费用率为评估指标,研究了劣化系统的周期预防性维修策略。 In long run rate for evaluation index, periodic preventive maintenance strategy of deteriorating system is studied.
55725 假定开展的周期预防性维修介于最小维修和完全维修之间,维修间隔期间的故障过程用非齐次泊松过程进行描述,在此基础上采用比例寿命回退模型对预防性维修效果进行建模,给出了最佳预防性维修周期T和预防性维修次数N的计算方法以及参数应当满足的条件,同时结合实际情况给出了(N,T)策略的优化求解算法,最后通过数值算例,验证了所提方法的可行性。 Assumed periodic preventive maintenance conducted between minimum maintenance and maintenance, the maintenance intervals during the failure process of using the nonhomogeneous poisson process is described, on the basis of the proportion of life back model is used to modeling the preventive maintenance, T gives the optimal preventive maintenance cycle and preventive maintenance number N method as well as parameters shall meet the requirements, and combining with the actual situation of (N, T) strategy was given optimization algorithm, finally, a numerical example, the feasibility of the proposed method was verified.
55726 考虑权重因素,建立了加权网络的级联故障模型,其中初始负荷定义为节点强度的函数且其分布通过控制参数α可调,当节点故障时其负荷通过一定的规则分配给邻居节点。 Consider weight factor, has established the cascading failure model of the weighted network, in which the initial load is defined as the function of node strength and its distribution is tunable by controlling the parameter, when the load node failure by certain rules assigned to neighbor nodes.